The Bronze Age which includes III-I mln B.C. is a period of radical changes in Central Asia. First of all, it is related with the invention of Bronze implements consisting tin, copper and lead solution.
The first half of the I mil. B.C. is considered as a period of great changes in financial, political and cultural life of Bactrian land, that joined the territories Surkhan oasis, Southern Tajikistan and Northern Afghanistan